.app {
  height: 200px;
  display: flex;
  flex-flow: row;
  justify-content: space-between;
  border: 1px solid lightblue; }
  .app .nav {
    width: 200px;
    padding: 10px;
    margin: 10px;
    border: 1px solid lightsalmon; }
  .app .content {
    flex: 1;
    padding: 10px;
    margin: 10px;
    border: 1px solid lightgreen; }

.nav-link {
  color: blue;
  text-decoration: underline; }

.selected {
  color: black; }
